Abhishek Rastogi | 9971433 | 2014-04-02 19:38:12 +0530 | [diff] [blame] | 1 | /* |
| 2 | ************************************************************************** |
| 3 | * Copyright (c) 2014, The Linux Foundation. All rights reserved. |
| 4 | * Permission to use, copy, modify, and/or distribute this software for |
| 5 | * any purpose with or without fee is hereby granted, provided that the |
| 6 | * above copyright notice and this permission notice appear in all copies. |
| 7 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 8 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 9 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| 10 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 11 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 12 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT |
| 13 | * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 14 | ************************************************************************** |
| 15 | */ |
| 16 | |
| 17 | /* |
| 18 | * nss_cmn.c |
| 19 | * NSS generic APIs |
| 20 | */ |
| 21 | |
| 22 | #include "nss_tx_rx_common.h" |
| 23 | |
| 24 | /* |
| 25 | * nss_cmn_msg_init() |
| 26 | * Initialize the common message structure. |
| 27 | */ |
| 28 | void nss_cmn_msg_init(struct nss_cmn_msg *ncm, uint16_t if_num, uint32_t type, uint32_t len, void *cb, void *app_data) |
| 29 | { |
| 30 | ncm->interface = if_num; |
| 31 | ncm->version = NSS_HLOS_MESSAGE_VERSION; |
| 32 | ncm->type = type; |
| 33 | ncm->len = len; |
| 34 | ncm->cb = (uint32_t)cb; |
| 35 | ncm->app_data = (uint32_t)app_data; |
| 36 | } |
| 37 | |
| 38 | /* |
| 39 | * nss_cmn_get_interface_number() |
| 40 | * Return the interface number of the NSS net_device. |
| 41 | * |
| 42 | * Returns -1 on failure or the interface number of dev is an NSS net_device. |
| 43 | */ |
| 44 | int32_t nss_cmn_get_interface_number(struct nss_ctx_instance *nss_ctx, struct net_device *dev) |
| 45 | { |
| 46 | int i; |
| 47 | |
| 48 | NSS_VERIFY_CTX_MAGIC(nss_ctx); |
| 49 | if (unlikely(nss_ctx->state != NSS_CORE_STATE_INITIALIZED)) { |
| 50 | nss_warning("%p: Interface number could not be found as core not ready", nss_ctx); |
| 51 | return -1; |
| 52 | } |
| 53 | |
| 54 | nss_assert(dev != 0); |
| 55 | |
| 56 | /* |
| 57 | * Check physical interface table |
| 58 | */ |
| 59 | for (i = 0; i < NSS_MAX_NET_INTERFACES; i++) { |
| 60 | if (dev == ((struct nss_ctx_instance *)nss_ctx)->nss_top->if_ctx[i]) { |
| 61 | return i; |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | nss_warning("%p: Interface number could not be found as interface has not registered yet", nss_ctx); |
| 66 | return -1; |
| 67 | } |
| 68 | |
| 69 | /* |
| 70 | * nss_cmn_get_interface_dev() |
| 71 | * Return the net_device for NSS interface id. |
| 72 | * |
| 73 | * Returns NULL on failure or the net_device for NSS interface id. |
| 74 | */ |
| 75 | struct net_device *nss_cmn_get_interface_dev(struct nss_ctx_instance *ctx, uint32_t if_num) |
| 76 | { |
| 77 | struct nss_ctx_instance *nss_ctx = (struct nss_ctx_instance *)ctx; |
| 78 | |
| 79 | NSS_VERIFY_CTX_MAGIC(nss_ctx); |
| 80 | if (unlikely(nss_ctx->state != NSS_CORE_STATE_INITIALIZED)) { |
| 81 | nss_warning("%p: Interface device could not be found as core not ready", nss_ctx); |
| 82 | return NULL; |
| 83 | } |
| 84 | |
| 85 | if (unlikely(if_num >= NSS_MAX_NET_INTERFACES)) { |
| 86 | return NULL; |
| 87 | } |
| 88 | |
| 89 | return nss_ctx->nss_top->if_ctx[if_num]; |
| 90 | } |
| 91 | |
| 92 | /* |
Gareth Williams | b52af51 | 2014-04-25 19:31:15 +0100 | [diff] [blame^] | 93 | * nss_cmn_get_interface_number_by_dev() |
| 94 | * Return the NSS interface id for the net_device. |
| 95 | * |
| 96 | * Returns < 0 on failure or the NSS interface id for the given device. |
| 97 | */ |
| 98 | int32_t nss_cmn_get_interface_number_by_dev(struct net_device *dev) |
| 99 | { |
| 100 | int i; |
| 101 | |
| 102 | nss_assert(dev != 0); |
| 103 | |
| 104 | /* |
| 105 | * Check physical interface table |
| 106 | */ |
| 107 | for (i = 0; i < NSS_MAX_NET_INTERFACES; i++) { |
| 108 | if (dev == nss_top_main.if_ctx[i]) { |
| 109 | return i; |
| 110 | } |
| 111 | } |
| 112 | |
| 113 | nss_warning("Interface number could not be found for %p (%s) as interface has not registered yet", dev, dev->name); |
| 114 | return -1; |
| 115 | } |
| 116 | |
| 117 | /* |
Abhishek Rastogi | 9971433 | 2014-04-02 19:38:12 +0530 | [diff] [blame] | 118 | * nss_cmn_get_state() |
| 119 | * return the NSS initialization state |
| 120 | */ |
| 121 | nss_state_t nss_cmn_get_state(struct nss_ctx_instance *ctx) |
| 122 | { |
| 123 | struct nss_ctx_instance *nss_ctx = (struct nss_ctx_instance *)ctx; |
| 124 | nss_state_t state = NSS_STATE_UNINITIALIZED; |
| 125 | |
| 126 | NSS_VERIFY_CTX_MAGIC(nss_ctx); |
| 127 | spin_lock_bh(&nss_top_main.lock); |
| 128 | if (nss_ctx->state == NSS_CORE_STATE_INITIALIZED) { |
| 129 | state = NSS_STATE_INITIALIZED; |
| 130 | } |
| 131 | spin_unlock_bh(&nss_top_main.lock); |
| 132 | |
| 133 | return state; |
| 134 | } |
| 135 | |
| 136 | /* |
| 137 | * nss_cmn_interface_is_virtual() |
| 138 | * Return true if the interface number is a virtual NSS interface |
| 139 | */ |
| 140 | bool nss_cmn_interface_is_virtual(void *nss_ctx, int32_t interface_num) |
| 141 | { |
| 142 | return (NSS_IS_IF_TYPE(VIRTUAL, interface_num)); |
| 143 | } |
| 144 | |
| 145 | /* |
| 146 | * nss_cmn_register_queue_decongestion() |
| 147 | * Register for queue decongestion event |
| 148 | */ |
| 149 | nss_cb_register_status_t nss_cmn_register_queue_decongestion(struct nss_ctx_instance *nss_ctx, nss_cmn_queue_decongestion_callback_t event_callback, void *app_ctx) |
| 150 | { |
| 151 | uint32_t i; |
| 152 | |
| 153 | NSS_VERIFY_CTX_MAGIC(nss_ctx); |
| 154 | spin_lock_bh(&nss_ctx->decongest_cb_lock); |
| 155 | |
| 156 | /* |
| 157 | * Find vacant location in callback table |
| 158 | */ |
| 159 | for (i = 0; i< NSS_MAX_CLIENTS; i++) { |
| 160 | if (nss_ctx->queue_decongestion_callback[i] == NULL) { |
| 161 | nss_ctx->queue_decongestion_callback[i] = event_callback; |
| 162 | nss_ctx->queue_decongestion_ctx[i] = app_ctx; |
| 163 | spin_unlock_bh(&nss_ctx->decongest_cb_lock); |
| 164 | return NSS_CB_REGISTER_SUCCESS; |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | spin_unlock_bh(&nss_ctx->decongest_cb_lock); |
| 169 | return NSS_CB_REGISTER_FAILED; |
| 170 | } |
| 171 | |
| 172 | /* |
| 173 | * nss_cmn_unregister_queue_decongestion() |
| 174 | * Unregister for queue decongestion event |
| 175 | */ |
| 176 | nss_cb_unregister_status_t nss_cmn_unregister_queue_decongestion(struct nss_ctx_instance *nss_ctx, nss_cmn_queue_decongestion_callback_t event_callback) |
| 177 | { |
| 178 | uint32_t i; |
| 179 | |
| 180 | NSS_VERIFY_CTX_MAGIC(nss_ctx); |
| 181 | spin_lock_bh(&nss_ctx->decongest_cb_lock); |
| 182 | |
| 183 | /* |
| 184 | * Find actual location in callback table |
| 185 | */ |
| 186 | for (i = 0; i< NSS_MAX_CLIENTS; i++) { |
| 187 | if (nss_ctx->queue_decongestion_callback[i] == event_callback) { |
| 188 | nss_ctx->queue_decongestion_callback[i] = NULL; |
| 189 | nss_ctx->queue_decongestion_ctx[i] = NULL; |
| 190 | spin_unlock_bh(&nss_ctx->decongest_cb_lock); |
| 191 | return NSS_CB_UNREGISTER_SUCCESS; |
| 192 | } |
| 193 | } |
| 194 | |
| 195 | spin_unlock_bh(&nss_ctx->decongest_cb_lock); |
| 196 | return NSS_CB_UNREGISTER_FAILED; |
| 197 | } |
| 198 | |
| 199 | EXPORT_SYMBOL(nss_cmn_get_interface_number); |
| 200 | EXPORT_SYMBOL(nss_cmn_get_interface_dev); |
| 201 | EXPORT_SYMBOL(nss_cmn_get_state); |
| 202 | EXPORT_SYMBOL(nss_cmn_interface_is_virtual); |
| 203 | EXPORT_SYMBOL(nss_cmn_msg_init); |
Gareth Williams | b52af51 | 2014-04-25 19:31:15 +0100 | [diff] [blame^] | 204 | EXPORT_SYMBOL(nss_cmn_get_interface_number_by_dev); |
Abhishek Rastogi | 9971433 | 2014-04-02 19:38:12 +0530 | [diff] [blame] | 205 | |
| 206 | EXPORT_SYMBOL(nss_cmn_register_queue_decongestion); |
| 207 | EXPORT_SYMBOL(nss_cmn_unregister_queue_decongestion); |
| 208 | |